Statistics Dictionary
To see a definition, select a term from the dropdown text box below. The statistics
dictionary will display the definition, plus links to related web pages.
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Factorial
In general, n objects can be arranged in n(n - 1)(n -
2) ... (3)(2)(1) ways. This product is represented by the symbol n!,
which is called n factorial. By convention, 0! = 1.
Thus, 0! = 1; 2! = (2)(1) = 2; 3! = (3)(2)(1) = 6; 4! = (4)(3)(2)(1) = 24; 5! =
(5)(4)(3)(2)(1) = 120; and so on.
